High Planar Arrays and Array Feeds for Satellite Communications

TL;DRAbstract

Limited scan range beamsteering can serve as a cost-effective solution for three application scenarios in satellite communications. Two feasible technical paths to realize the function are discussed in this paper. The first one is to utilize a electronically steered array feed with a conventional parabolic reflector. By feeding the reflector with different weights across the array feed, the phase distribution on the dish aperture is continuously shifted leading to a steered beam. Acquisition and tracking functions can be realized economically by integrating a power detector based feedback system. A necessary calibration process is provided to ensure a correct indicator of signalto- noise ratio. One dimensional bemsteering was demonstrated experimentally and an improved two dimensional system is shown as well. The second path is to use a tile array with each tile consisting of a passive network fed subarray, which reduces the cost of active components significantly, at the expense of be

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